Abstract
Several species of the genus Vochysia (Vochysiaceae) are used by traditional communities in South America to relieve ailments linked to inflammation, such as skin sores, asthma and pulmonary congestion. As the cAMP phosphodiesterase 4 isozyme (PDE4) is currently considered as an intracellular target for new antiinflammatory drugs, several constituents of Vochysia pacifica Cuatrec., an endemic tree from the Western coast of Colombia, were tested for their ability to inhibit PDE4. Purification of the methanol extract of the stem bark of this species led to the isolation of seven known triterpene derivatives: betulinic acid, sericic acid, 24-hydroxytormentic acid, trachelosperogenin B, 24-hydroxytormentic acid glucosyl ester, quadranoside I and niga-ichigoside F1. One triterpene glycoside, quadranoside I, and two triterpenes, betulinic and sericic acids, exhibited mild inhibitory activity on the isolated PDE4 isozyme.
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